Car-wheel



J. BAKER.

Car Wheel.

Patented Oct. 4. 1853.

IIIIIIIIIIIIIIIIIIIIII/IIIIIIIIIIIIIIJIIIMIIIIIIIII "UNITED STATES PAENTOFFICE.

JOEL BAKER, OF BOSTON, MASSACHUSETTS.

CAB-WHEEL Specification of Letters Patent No. 10,062, dated October 4,1853.

To all whom it may concern Be it known that I, JOEL BAKER, of the cityof Boston, in the county of Suffolk, in the State of Massachusetts, haveinvented a new and Improved Railroad-Gar Wheel; and I do hereby declarethat the following is a full and exact description thereof, referencebeing had to the accompanying drawings and to the letters of referencemarked thereon.

The nature of my improvement consists in making rail road car wheels oftwo dis tinct convex hub plates and two distinct rim plates, each beingconnected by a number of short small branches, which pass throughopening of the opposite convex plate up to the rim plate, interlacingthe convex and rimplates at proper intervals, in such a manner as toform a whole compact wheel of great strength, and at the same timegiving each plate the greatest amount of curvilinear surface from thehub to the tread of the rim, without any interposing connection, wherebythe greatest extent of expansion and contraction as well as elas ticityis obtained.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction.

In the accompanying drawing Figure 1 represents a side view of thewheel; Fig. 2 a section of the same. Fig. 3 shows the inside of the rimwith the worm rib.

I construct my wheel in the following manner: The convex plates Z) and 0see Fig. 1 and Fig. 2 are extended up from the hub a to three fourths ofthe entire distance between the hub a and rimplate e, at that point-(shown in the drawing by dotted lines m :0 Figs. 1 and 2) each convexplate has a number of short branches (Z, (Z, (Z, (Z, &c., and (Z', (Z',cl, d, which are arranged in such a manner that the branch of one platecomes opposite to the opening cut out between two branches on the otherplate, and allowed to pass alternately from one convex-plate, to therim-plate on the opposite side, as shown in Fig. 2, when the convexplate 6, extends up to the dotted line 00 as at the point when the shortbranches (Z and cl begin. The short branch (Z of plate 5 extends throughthe opening of plate 0, over and on the rimplate f, the short branch (Zof convex plate 0 passes beyond the short branch cZ up and on to therimplate e, interlacing it all around and connecting the convex platesand rimplates alternately and forming a strong and thoroughly bracedwheel. To stren then the short branches, I make them at the point wherethey project from the convex plate gradually thicker to the point ofintersection, and I cast upon each side of such a branch a fin or flangeas shown in Figs. 1 and 2 marked 5', s, s, to increase their strength.

In order to strengthen the tread of the wheel I cast a worm rib t on theinside of it as shown in Fig. 2 and Fig. 8. This worm rib not onlystrengthens the tread in the center but at various points.

In constructing car wheels in the above described manner, I require onlyone annular core, whereby the manufacture is rendered more simple andcheaper than in those wheels when two cases are necessary.

Various attempts have been hitherto made to construct car wheels in suchmanner that the contraction in cooling shall not break manner and forthe purposes set forth.

JOEL BAKER. Witnesses CH. L. FLEisoHMAN, CHAS. Gr. PAGE.

